so being a dummy i accidentally deleted messages from a user here and now i don't have their username. i received my package today and want to leave feedback, i have their real name, is there a way to find out a username based off that?

I'd either post a last name or even a zip code and I'd guess someone could find it from those. Other option would be to check your sent messages, might have something there. Last option I can think of is to look up yourself in the members list and search your posts.